So my questions are first will this build work together? Are there any glaring issues that I've missed? Also I'm thinking of upgrading the cpu to the i7 980x Extreme, is this upgrade worth it? Should i buy two radeon hd 5970s? I'm want to use my home theater surround system and av receiver for the sound so do I need the sound card? And is the network gaming card worth the money? Thanks for any help.